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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /sysdeps/mach/thread_state.h
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diff --git a/sysdeps/mach/thread_state.h b/sysdeps/mach/thread_state.h
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+/* Generic definitions for dealing with Mach thread states.
+Copyright (C) 1994 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+
+/* Everything else is called `thread_state', but CMU's header file is
+ called `thread_status'. Oh boy. */
+#include <mach/thread_status.h>
+
+/* The machine-dependent thread_state.h file can either define these
+ macros, or just define PC and SP to the register names. */
+
+#ifndef MACHINE_THREAD_STATE_SET_PC
+#define MACHINE_THREAD_STATE_SET_PC(ts, pc) \
+ ((ts)->PC = (unsigned long int) (pc))
+#endif
+#ifndef MACHINE_THREAD_STATE_SET_SP
+#ifdef STACK_GROWTH_UP
+#define MACHINE_THREAD_STATE_SET_SP(ts, stack, size) \
+ ((ts)->SP = (unsigned long int) (stack))
+#else
+#define MACHINE_THREAD_STATE_SET_SP(ts, stack, size) \
+ ((ts)->SP = (unsigned long int) (stack) + (size))
+#endif
+#endif
+
+/* These functions are of use in machine-dependent signal trampoline
+ implementations. */
+
+#include <string.h> /* size_t, memcpy */
+#include <mach/mach_interface.h> /* __thread_get_state */
+
+static inline int
+machine_get_state (thread_t thread, struct machine_thread_all_state *state,
+ int flavor, void *stateptr, void *scpptr, size_t size)
+{
+ if (state->set & (1 << flavor))
+ {
+ /* Copy the saved state. */
+ memcpy (scpptr, stateptr, size);
+ return 1;
+ }
+ else
+ {
+ /* Noone asked about this flavor of state before; fetch the state
+ directly from the kernel into the sigcontext. */
+ mach_msg_type_number_t got = (size / sizeof (int));
+ return (! __thread_get_state (thread, flavor, scpptr, &got)
+ && got == (size / sizeof (int)));
+ }
+}
+
+static inline int
+machine_get_basic_state (thread_t thread,
+ struct machine_thread_all_state *state)
+{
+ mach_msg_type_number_t count;
+
+ if (state->set & (1 << MACHINE_THREAD_STATE_FLAVOR))
+ return 1;
+
+ count = MACHINE_THREAD_STATE_COUNT;
+ if (__thread_get_state (thread, MACHINE_THREAD_STATE_FLAVOR,
+ (natural_t *) &state->basic,
+ &count) != KERN_SUCCESS ||
+ count != MACHINE_THREAD_STATE_COUNT)
+ /* What kind of thread?? */
+ return 0; /* XXX */
+
+ state->set |= 1 << MACHINE_THREAD_STATE_FLAVOR;
+ return 1;
+}